// license:BSD-3-Clause // copyright-holders:Nigel Barnes /********************************************************************** VTI User Port and SCSI Podule http://chrisacorns.computinghistory.org.uk/32bit_UpgradesH2Z/VTI_userportSCSI.html TODO: - map the EEPROM - fix User Port module **********************************************************************/ #include "emu.h" #include "scsi_vti.h" #include "machine/6522via.h" #include "machine/eepromser.h" #include "machine/ncr5390.h" #include "bus/bbc/userport/userport.h" #include "bus/nscsi/devices.h" namespace { class arc_scsi_vti_device : public device_t, public device_archimedes_podule_interface { public: // construction/destruction arc_scsi_vti_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock); static constexpr feature_type imperfect_features() { return feature::DISK; } protected: // device-level overrides virtual void device_start() override; virtual void device_reset() override; // optional information overrides virtual void device_add_mconfig(machine_config &config) override; virtual const tiny_rom_entry *device_rom_region() const override; // device_archimedes_podule_interface overrides virtual void ioc_map(address_map &map) override; virtual void memc_map(address_map &map) override; private: required_device m_fas216; required_device m_eeprom; required_memory_region m_podule_rom; u8 m_rom_page; u8 m_drq_status; }; void arc_scsi_vti_device::ioc_map(address_map &map) { map(0x0000, 0x1fff).lr8(NAME([this](offs_t offset) { return m_podule_rom->base()[offset | ((m_rom_page << 11) & 0xf800)]; })).umask32(0x000000ff); map(0x3d00, 0x3d3f).rw("via", FUNC(via6522_device::read), FUNC(via6522_device::write)).umask32(0x000000ff); } void arc_scsi_vti_device::memc_map(address_map &map) { map(0x2000, 0x21ff).lr8(NAME([this](offs_t offset) { return m_fas216->read(offset >> 3); })).umask32(0x000000ff); map(0x2000, 0x21ff).lw8(NAME([this](offs_t offset, u8 data) { m_fas216->write(offset >> 3, data); })).umask32(0x000000ff); map(0x2200, 0x2203).rw(m_fas216, FUNC(ncr53c94_device::dma16_r), FUNC(ncr53c94_device::dma16_w)).umask32(0x0000ffff); map(0x2600, 0x2600).lr8(NAME([this]() { return m_drq_status; })); } //------------------------------------------------- // ROM( scsi_vti ) //------------------------------------------------- ROM_START( scsi_vti ) ROM_REGION(0x10000, "podule_rom", 0) ROM_LOAD("vti_up_powerrom.bin", 0x0000, 0x10000, CRC(7ec5854c) SHA1(eb20b1369964cfaee156ba1fc3636997407cc7ba)) ROM_END const tiny_rom_entry *arc_scsi_vti_device::device_rom_region() const { return ROM_NAME( scsi_vti ); } //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void arc_scsi_vti_device::device_add_mconfig(machine_config &config) { NSCSI_BUS(config, "scsi"); NSCSI_CONNECTOR(config, "scsi:0", default_scsi_devices, "harddisk", false); NSCSI_CONNECTOR(config, "scsi:1", default_scsi_devices, nullptr, false); NSCSI_CONNECTOR(config, "scsi:2", default_scsi_devices, nullptr, false); NSCSI_CONNECTOR(config, "scsi:3", default_scsi_devices, nullptr, false); NSCSI_CONNECTOR(config, "scsi:4", default_scsi_devices, nullptr, false); NSCSI_CONNECTOR(config, "scsi:5", default_scsi_devices, nullptr, false); NSCSI_CONNECTOR(config, "scsi:6", default_scsi_devices, nullptr, false); NSCSI_CONNECTOR(config, "scsi:7").option_set("fas216", NCR53CF94).clock(24.576_MHz_XTAL) // FAS216 .machine_config([this](device_t *device) { ncr53c94_device &fas216(downcast(*device)); fas216.set_busmd(ncr53c94_device::busmd_t::BUSMD_1); fas216.irq_handler_cb().set([this](int state) { set_pirq(state); }); fas216.drq_handler_cb().set([this](int state) { m_drq_status = state; }); }); EEPROM_93C06_16BIT(config, m_eeprom); // 2600 b0 via6522_device &via(MOS6522(config, "via", DERIVED_CLOCK(1, 4))); via.irq_handler().set([this](int state) { set_pirq(state); }); via.writepa_handler().set([this](u8 data) { m_rom_page = data; }); via.readpb_handler().set("userport", FUNC(bbc_userport_slot_device::pb_r)); via.writepb_handler().set("userport", FUNC(bbc_userport_slot_device::pb_w)); via.cb1_handler().set("userport", FUNC(bbc_userport_slot_device::write_cb1)); via.cb2_handler().set("userport", FUNC(bbc_userport_slot_device::write_cb2)); bbc_userport_slot_device &userport(BBC_USERPORT_SLOT(config, "userport", bbc_userport_devices, nullptr)); userport.cb1_handler().set("via", FUNC(via6522_device::write_cb1)); userport.cb2_handler().set("via", FUNC(via6522_device::write_cb2)); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // arc_scsi_vti_device - constructor //------------------------------------------------- arc_scsi_vti_device::arc_scsi_vti_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : device_t(mconfig, ARC_SCSI_VTI, tag, owner, clock) , device_archimedes_podule_interface(mconfig, *this) , m_fas216(*this, "scsi:7:fas216") , m_eeprom(*this, "eeprom") , m_podule_rom(*this, "podule_rom") , m_rom_page(0) , m_drq_status(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void arc_scsi_vti_device::device_start() { save_item(NAME(m_rom_page)); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void arc_scsi_vti_device::device_reset() { m_rom_page = 0x00; } } // anonymous namespace //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE_PRIVATE(ARC_SCSI_VTI, device_archimedes_podule_interface, arc_scsi_vti_device, "arc_scsi_vti", "VTI User Port and SCSI Podule")